loongson/pypi: links for py-causalflow

loongson/mirror py_causalflow-4.0.5.tar.gz
loongson/mirror py_causalflow-4.0.4.tar.gz
loongson/mirror py_causalflow-4.0.3.tar.gz
loongson/mirror py_causalflow-4.0.2.tar.gz
loongson/mirror py_causalflow-4.0.1.tar.gz
loongson/mirror py_causalflow-4.0.0.tar.gz